We're at Otter Rapids July 2004 as the northbound 423 "The Polar Bear Express" with GP38-2's 1802 & 1804 leading slowly rolls through the tiny northern settlement. Otter is located at the approximate halfway point between Cochrane and Moosonee. It's at this location that the Crew performs what's called a "P.K. Check" which is basicly a visual inspection of the Polar Bear's consist.